Brushless direct current motor water pump

Abstract

The invention belongs to the technical field of air conditioners. According to the invention, the problems of low efficiency and high energy consumption of a condensed-water discharging pump of the original ceiling type air conditioner are solved. The key points of the technical scheme are as follows: due to special design of a direct-current brushless motor of an outer rotor and a shaft-output structure of a rotor shell and a plastic sealing process, a newly-designed motor not only can be connected with the size of an original shaded-pole water pump on structure size, is consistent in assembly and can be directly replaced, but also can meet certain protection-grade requirement, so that a product can work normally and still under the muggy and wet working environments.

Description

technical field [0001] The invention belongs to the technical field of home appliances, and in particular relates to a brushless DC motor water pump. Background technique [0002] The air conditioner has the ability to generate cold air and send air to the room. During the heat exchange process of the indoor hot air, condensed water will be generated on the heat exchanger. Therefore, the air conditioner is generally equipped with a drainage pump, mainly to avoid natural drainage. When it is not smooth, it is convenient to discharge the condensed water. At present, shaded pole drainage pumps are generally used for air conditioner drainage pumps, but the efficiency of shaded pole drainage pumps is low, generally around 12%, and it will also produce adverse effects such as loud noise and large pump vibration. [0003] At the same time, the driving circuit of conventional water pumps still has the following defects: (1) The conventional motor driving circuit is designed and con...

AI Technical Summary

Problems solved by technology

At present, shaded pole drainage pumps are generally used for air conditioner drainage pumps, but the efficiency of shaded pole drainage pumps is low, generally around 12%, and it will also produce adverse effects such as loud noise and large vibration of the pump.

[0003] At the same time, the driving circuit of conventional water pumps still has the following defects: (1) The conventional motor driving circuit is designed and connected with a single main control chip + 6 external MOSFETs + external Gate Drive circuit. The device selection is more, the connection is complicated, and the reliability of the entire circuit control system is low; (2) the conventional MOSFET manufacturing process, its on-resistance is generally above 0.5 ohms, and the outside of the chip needs to be connected to a large-area metal heat sink for heat dissipation ; (3) The conventional brushless motor adopt

Images